// "License": Public Domain
// I, Mathias Panzenböck, place this file hereby into the public domain. Use it
// at your own risk for whatever you like. In case there are jurisdictions that
// don't support putting things in the public domain you can also consider it to
// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to.
// This code is trivial anyway. Consider it an example on how to get the endian
// conversion functions on different platforms.

// Forked from https://gist.github.com/panzi/6856583
#ifndef PORTABLE_ENDIAN_H_
#define PORTABLE_ENDIAN_H_

#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && \
    !defined(__WINDOWS__)

#define __WINDOWS__

#endif

#if defined(__linux__) || defined(__CYGWIN__)

#include <endian.h>  // IWYU pragma: export

#elif defined(__APPLE__)

#include <libkern/OSByteOrder.h>

#define htobe16(x) OSSwapHostToBigInt16(x)
#define htole16(x) OSSwapHostToLittleInt16(x)
#define be16toh(x) OSSwapBigToHostInt16(x)
#define le16toh(x) OSSwapLittleToHostInt16(x)

#define htobe32(x) OSSwapHostToBigInt32(x)
#define htole32(x) OSSwapHostToLittleInt32(x)
#define be32toh(x) OSSwapBigToHostInt32(x)
#define le32toh(x) OSSwapLittleToHostInt32(x)

#define htobe64(x) OSSwapHostToBigInt64(x)
#define htole64(x) OSSwapHostToLittleInt64(x)
#define be64toh(x) OSSwapBigToHostInt64(x)
#define le64toh(x) OSSwapLittleToHostInt64(x)

#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN

#elif defined(__OpenBSD__)

#include <endian.h>  // IWYU pragma: export

#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN

#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)

#include <sys/endian.h>

#define be16toh(x) betoh16(x)
#define le16toh(x) letoh16(x)

#define be32toh(x) betoh32(x)
#define le32toh(x) letoh32(x)

#define be64toh(x) betoh64(x)
#define le64toh(x) letoh64(x)

#elif defined(__WINDOWS__)

#include <winsock2.h>
#ifdef __GNUC__
#include <sys/param.h>
#endif

#if BYTE_ORDER == LITTLE_ENDIAN

#define htobe16(x) htons(x)
#define htole16(x) (x)
#define be16toh(x) ntohs(x)
#define le16toh(x) (x)

#define htobe32(x) htonl(x)
#define htole32(x) (x)
#define be32toh(x) ntohl(x)
#define le32toh(x) (x)

#define htobe64(x) htonll(x)
#define htole64(x) (x)
#define be64toh(x) ntohll(x)
#define le64toh(x) (x)

#elif BYTE_ORDER == BIG_ENDIAN

/* that would be xbox 360 */
#define htobe16(x) (x)
#define htole16(x) __builtin_bswap16(x)
#define be16toh(x) (x)
#define le16toh(x) __builtin_bswap16(x)

#define htobe32(x) (x)
#define htole32(x) __builtin_bswap32(x)
#define be32toh(x) (x)
#define le32toh(x) __builtin_bswap32(x)

#define htobe64(x) (x)
#define htole64(x) __builtin_bswap64(x)
#define be64toh(x) (x)
#define le64toh(x) __builtin_bswap64(x)

#else

#error byte order not supported

#endif

#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN

#elif defined(__QNXNTO__)

#include <gulliver.h>

#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#define __PDP_ENDIAN 3412

#if defined(__BIGENDIAN__)

#define __BYTE_ORDER __BIG_ENDIAN

#define htobe16(x) (x)
#define htobe32(x) (x)
#define htobe64(x) (x)

#define htole16(x) ENDIAN_SWAP16(x)
#define htole32(x) ENDIAN_SWAP32(x)
#define htole64(x) ENDIAN_SWAP64(x)

#elif defined(__LITTLEENDIAN__)

#define __BYTE_ORDER __LITTLE_ENDIAN

#define htole16(x) (x)
#define htole32(x) (x)
#define htole64(x) (x)

#define htobe16(x) ENDIAN_SWAP16(x)
#define htobe32(x) ENDIAN_SWAP32(x)
#define htobe64(x) ENDIAN_SWAP64(x)

#else

#error byte order not supported

#endif

#define be16toh(x) ENDIAN_BE16(x)
#define be32toh(x) ENDIAN_BE32(x)
#define be64toh(x) ENDIAN_BE64(x)
#define le16toh(x) ENDIAN_LE16(x)
#define le32toh(x) ENDIAN_LE32(x)
#define le64toh(x) ENDIAN_LE64(x)

#else

#error platform not supported

#endif

#endif
